|Item model number||CM1000-100NAS|
|Item Weight||13.4 ounces|
|Product Dimensions||5.4 x 5.9 x 8.8 inches|
|Item Dimensions L x W x H||5.4 x 5.9 x 8.8 inches|
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NETGEAR CM1000 DOCSIS 3.1 Ultra-High Speed Cable Modem. Max download speeds of 1.0 Gbps – certified for XFINITY by Comcast and Cox (CM1000)
|Price:||$171.99 & FREE Shipping. Details|
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- Compatible with Xfinity from Comcast, Cox, Mediacom Cable, and more.
- Not compatible with Spectrum (Charter, Time Warner Cable, Brighthouse). **Not compatible with bundled voice services. Not a WiFi device. Needs a separate WiFi Router**
- Cable Modem only (no WiFi router)
- ELIMINTE MONTHLY CABLE MODEM RENTAL FEES - Up to $120 per year
- Support all cable internet speed tiers, up to Gigabit service. Separate router required for WiFi. 32x8 channel bonding
- Ideal for streaming 4K UHD content, fastest downloads, and high-speed online gaming
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From the manufacturer
XFINITY Blast/Extreme Internet plans.
- Call your ISP for additional compatibility information.
- Not compatible with Cable bundled voice services.
- Not cerified for Charter or TWC.
- Backward compatible to DOCSIS 3.0.
NETGEAR CM1000 Ultra-High Speed Cable Modem
DOCSIS 3.1 Ready
The NETGEAR CM1000 Ultra-High Speed Cable Modem provides a connection to high-speed cable Internet with speeds up to 1 Gbps. It is one of the first DOCSIS 3.1 CableLabs Certified cable modem, 10X faster than DOCSIS 3.0. Working with DOCSIS 3.0 and DOCSIS 3.1 cable Internet service providers, it is the ultra-high speed cable modem ready for today’s service plans & future upgrades.
Save money over time by owning your cable equipment and avoiding monthly rental charges from your Internet provider.
Optimal Device for Streaming
Pair CM1000 with a NETGEAR router for ultimate and optimal 4K UHD video streaming.
One of the Fastest Cable Internet Access
- Up to 1 Gbps download for streaming HD videos, faster downloads, and highspeed online gaming.
- 32 downstream & 8 upstream SC-QAM channels.
- Fast web self-activation for XFINITY customers — Get connected without a service call.
- Gigabit Ethernet port — Fastest wired speeds to connect your router or computer.
DOCSIS 3.1 OFDM 2x2
Upgrading to a DOCSIS 3.1 modem means you'll still enjoy your current Internet service and be ready for the fastest speeds available in your service area.
Compare to similar items
The CM1000 Ultra-High Speed Cable Modem, with speeds up to 1Gbps and DOCSIS 3.1 is 10X faster than DOCSIS 3.0 devices. It’s backward compatible with DOCSIS 3.0 and ready for future service plan upgrades. A Gigabit Ethernet port provides faster access and downloads. Plus, there are no monthly rental fees.
Top customer reviews
When I first upgraded to the new gigabit here in Denver (from Xfinity), it was using their new Cable Modem/Router device (XB6-A) and I was only getting 500 Mbps download speed. It was also lagging in our house when several people were gaming and others were downloading, or even accessing intensive web-pages. (lagging = pings were going up).
Since upgrading to this Netgear CM1000, upgrading my cabling, and factory resetting my router, I'm now getting the most download throughput (~941 Mbps) and the lowest pings I've EVER seen! Connection is rock solid throughout the house.
SHORT ANSWER: Get this Netgear CM, upgrade your ethernet cables to Cat 6 (or Cat 5E for short distances) and then Factory Reset your router to get the most speed. You still may need a new router to reach gigabit speeds. I'm getting the most download throughput (~941 Mbps) and the lowest pings I've EVER seen!
I did lots of tests comparing this cable modem to the XB6-A that Xfinity provided. Here are some big things I learned:
1) Make sure your ethernet cables going from the cable modem to the router and from the router to your PC are CAT6 or at least CAT5E (for short distances).
2) Upgrading to this Netgear CM1000 Cable Modem LOWERED my ping/latency compared to the XB6-A that Xfinity provided. I just got a 5 MS Ping to the google server here in Denver! UNHEARD OF. Most of the time it's around 8-9ms with this new cable modem. I was getting 11-14 w/ the Xfinity modem. If you're a gamer, a lower ping matters!
3) The Xfinity XB6-A modem/router combo doesn't work too well when you have your own router also connected to it. Xfinity recommends you only use their device and disconnect your router.
4) Around 941 mbps is the max download speed that modern gigabit routers/switches can do right now so don't be worried if you can't get above that.
5) Many routers can't handle gigabit download speeds, especially if you've enabled any of the features like QoS, Traffic Meter, Keyword block, etc. My Netgear Nighthawk (R7000) was only getting 400-500 mbps (using speedtest) because I had enabled some of these features. Even when I disabled these features, the speed was still low. Doing a FACTORY reset fixed it, and now I'm getting 937 - 943 mbps download speed!!!
The reason these routers slow down when you enable extra features is because it disables CTF (cut through forwarding) and the router no longer uses it's faster processor. Some of the newer routers can still maintain max download speeds of 941 mbps while also allowing you to use QoS and other features.
6) There's a great website called Small Net Builder that compared routers to see which could reach 941 mbps download speed. I recommend you check that out if you need a new router.
Keep in mind that this Netgear CM1000 is JUST a cable modem. It's not a router. So if you only have 1 device you want to wire into it, you're fine but if you want to have more devices, and wireless, then you'll need a router too.
The Xfinity provided XB6-A is both a cable modem and a wireless router in one. I personally think it has some flaws that need to be worked out but appears to be a beefy piece of hardware. You can save yourself the $10/month rental by getting this Netgear CM1000.
P.S. I do plan to upgrade my router so that I can still get 941 mbps download speed while enabling QoS. With QoS, it will set aside a portion of your bandwidth (say 20%) for high priority traffic like gaming that need low latency, and then it will limit all other connections (like large downloads) to the other 80% the connection. Keep in mind, if you enable this and run a speedtest, it will appear lower simply because it's now reserving part of your bandwidth for other devices/traffic in your home.
I can confirm that this is an unmanaged device, and passes the public IP address on to whatever is plugged into it. It has no option for DHCP on the configuration page. This is, of course, typical for cable modems. The label on the bottom of the modem states that for DOCSIS 3.0, it supports 32 downstream channels and 8 upstream channels. For DOCSIS 3.1, it supports 2 downstream channels and 2 upstream channels.
With DOCSIS 3.1 compatibility, I am looking forward to not having to buy a new modem for a very long time (hopefully).
So far, this modem is only certified by Comcast and Cox. If you do not have one of these two providers, wait. I connected mine today to Comcast. There were a few hiccups. At first, Comcast could not see the modem on their equipment. After about 30 minutes of reconnection and rebooting on both ends, it saw the modem, but the router I was using--D-Link 2600, was incompatible. So, I switched over to my go-to, TP-Link AC 2300, we connected, and everything worked great. I am getting about the same speeds I was with the Arris SB6190: Max 240mbps, Min 180mbps downloads. This is what I expected. The real test will be when I connect the Nighthawk X4S. This will be in three weeks. I head out for a two week business trip to Europe the day before the router arrives. I will amend this review in September. Highly recommended.